OpenCode long sessions: Error from provider (Console): Upstream request failed: [invalid_request_error] The request contains invalid parameters

发生场景

Source(s): https://github.com/anomalyco/opencode/issues/47975 Status: workaround /compact confirmed by a commenter; root cause not confirmed; upstream fix not confirmed; not reproduced by us.

问题

Every message in a long-running session starts failing with this generic 400. Starting a new session or wiping OpenCode data helps only for a while. One user hit it at 97% context, another at around 910k tokens.

报错原文（已脱敏/规范化）

Error from provider (Console): Upstream request failed: [invalid_request_error] The request contains invalid parameters. Check the request body for any errors or inconsistencies.

适用环境

OpenCode CLI, Desktop, or Zed's ACP integration; reported mostly with Muse Spark models on OpenCode Go/Zen.

如何确认是这个问题

(our note) The error appears only in a long session near the context limit, while a fresh short session works.

不是这个问题时 / 边界

The error happens on a fresh, short session. (our note: then look at cause (a), or at your provider/model settings, e.g. a reasoning effort the endpoint doesn't accept.)

根因

Two causes were reported. (a) A commenter found the gateway advertised a max reasoning effort it then rejected with this same message; a collaborator said that was fixed in models.dev. (b) The remaining cases show up in long sessions (collaborator's guess, unconfirmed): the upstream returns a poor error when the context or compaction limit is reached.

修复步骤

1. In the failing session run /compact, then continue. → expect: the next message gets a normal reply (a commenter confirmed this at 97% context).
2. Update OpenCode to 2.0.30 or newer. The collaborator says those builds start compaction earlier; no one has confirmed it fixes this.

如何验证

After /compact, the next message gets a normal reply instead of the 400.

试过没用的办法

Switching between the free and paid variants of the same model (one user). New session / wiping data only helped temporarily.

验证范围

OpenCode < 2.0.30 era, Oct 2026